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  B/wds
  The Washington Visual Double Star Catalog (Mason+ 2001-2014)
If the WDS and associated databases were helpful for your research work, the following acknowledgement would be appreciated: "This research has made use of the Washington Double Star Catalog maintained at the U.S. Naval Observatory"
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1.B/wds/wdsThe Washington Double Star Catalog (main part) (142211 rows)

 
Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
  WDS (char) (i) WDS name (based on J2000 position) (meta.id;meta.main)
  Disc (char) Discoverer Code (1 to 4 letters) and Number (Note 5)   (meta.id)
  Comp (char) Components when more than 2 (Note 1)   (meta.code.multip)
  Obs1 yr (n) Date of first satisfactory observation (time.epoch)
  Obs2 yr (n) Date of last satisfactory observation (time.epoch)
  Nobs  Number of Observations (up to 9999) (meta.number)
  pa1 deg (n) Position Angle at date Obs1 (Note 2)   (pos.posAng)
  pa2 deg (n) Position Angle at date Obs2 (Note 2)   (pos.posAng)
  sep1 arcsec (n) Separation at date Obs1 (pos.angDistance;src.orbital)
  sep2 arcsec (n) Separation at date Obs12 (pos.angDistance;src.orbital)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  mag1 mag (n) Magnitude of First Component (phot.mag;em.opt)
  mag2 mag (n) Magnitude of Second Component (phot.mag;em.opt)
  SpType (char) Spectral Type (Primary/Secondary) (src.spType)
  pmRA1 mas/yr (n) Primary Proper Motion (RA) (pos.pm;pos.eq.ra)
  pmDE1 mas/yr (n) Primary Proper Motion (Dec) (pos.pm;pos.eq.dec)
  pmRA2 mas/yr (n) Secondary Proper Motion (RA) (pos.pm;pos.eq.ra)
  pmDE2 mas/yr (n) Secondary Proper Motion (Dec) (pos.pm;pos.eq.dec)
  DM (char) Durchmusterung Number (Note 3)   (meta.id)
  Notes (char) [B-Z ] Notes about the binary (Note 4)   (meta.note)
  n_RAJ2000 (char) [!] indicates a position derived from WDS name (meta.note)
  RAJ2000 "h:m:s" (i) Right Ascension J2000 (Ep=J2000, hours) (pos.eq.ra;meta.main)
  DEJ2000 "d:m:s" (i) Declination J2000 (Ep=J2000, degrees) (pos.eq.dec;meta.main)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
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